Dressing device for the dressing of profile grinding wheels

ABSTRACT

Dressing device for a form or profile grinding wheel. Two quills, each carrying a dressing tool at its respective end, are positioned coaxially within a sleeve and arranged with the respective dressing tools pointing in opposite directions. Means are provided for adjusting each quill independently of the other axially but nonrotatably. Each quill comprises a bearing for the other within said sleeve and the whole is arranged for arcuate movement about an axis perpendicular to the grinding wheel axis so that one quill can work on one grinding face of the wheel and thereafter the other quill can work on the other grinding face of the grinding wheel.

United States Patent [15] 3,683,884 Busch [45] Aug. 15, 1972 s41 DRESSING DEVICE FOR THE 2,390,967 12/1945 Swenson ..125/39 ux DRESSING OF PROFILE GRINDING 1,528,188 3/1925 Frost .1 125/ 11 B WHEELS P E H ldD wh' h d rimary xaminer-- aro ite ea [72] Inventor: Harry Busch, Waldsachsenerstrasse B h F 32, 8630 Coburg, Bavaria, Germany Attorney woodham' am ad and lynn [73] Assignee: Werkzeugmaschinenfabrik Adolf ABSTRACT waldnch Coburg Coburg,/Ewen" Dressing device for a form or profile grinding wheel. Germany Two quills, each carrying a dressing too] at its respec- [22] Filed: Nov. 2, 1970 tive end, are positioned coaxially within a sleeve and arranged with the respective dressing tools pointing in -[21] Appl' 86l05 opposite directions. Means are provided for adjusting each quill independently of the other axially but non- [30] Foreign Application Priority Data rotatably. Each quill comprises a bearing for the other within said sleeve and the whole is arranged for arcu- Nov. 11,1969 Gennany ..G 69 43 794.1 ate movement about an axis perpendicular to the grinding wheel axis so that one quill can work on one Uosa e I s e e e Q s Q s s s s s s s R [51] Ill!- CI. ....B24D 53/12 quill can work on the other g g face of the g [58] Field of Search 125/1 1, 39 mg wheeL [56] References Cited 6 Claims, 2 Drawing: Figures UNITED STATES PATENTS r 2,067,531 l/1937 lndge ..125/11 B PATENTEDAus 15 m2 3.683.884

INVENTOR' HAPPY 56/5614 MZKM W DRESSING DEVICE FOR THE DRESSING OF PROFILE GRINDING WHEELS The invention relates to a dressing device for the dressing of profile grinding wheels by means of a dressing tool inserted into a quill. Said quill is supported for the purpose of in-feed approximately perpendicularly with respect to the grinding wheel surface to be dressed, is relatively movably in a carrier sleeve, and the carrier sleeve itself is held in a support which is pivotable about an axis arranged perpendicularly to the axis of the grinding wheel.

In a known dressing device of this type, one can change the dressing from one side of the grinding wheel to the other side thereof only by taking the quill and its support sleeve out of the support and re-inserting same in a diametrically oppositely directed position. The quill thus then points into the opposite direction.

The basic purpose of the invention is to produce a dressing device of the above-mentioned type in which the exchanging or resetting of the quill is not required and with which, in spite of this, the dressing operation can be changed from one side of the grinding wheel to the other side.

To attain this purpose, the invention provides that two coaxially, oppositely arranged quills are supported for limited movement in an axial direction independent from one another in a carrier sleeve.

By this inventive construction of the dressing device, resetting thereof is no longer necessary. Instead after one side of the grinding wheel has been dressed by means of the dressing tool of one quill to the centerof the grinding wheel, the support only needs to be pivoted about its axis which is arranged perpendicularly to the axis of the grinding wheel whereupon the other quill which is arranged oppositely in the carrier sleeve can work the other side of the grinding wheel. It is of particular advantage that the two coaxial quills, which are oppositely arranged to one another, are supported movably independent from one another and are thus feedable with respect to the grinding wheel. The feeding of the one quill thus does not influence the position of the other quill with respect to the support and the grinding wheel.

The two coaxial quills are advantageously supported movably in one another, whereby the end of one quill which is opposite the dressing tool grips around the other quill like a bearing. Both quills have advantageously the same diameter and have in their respective central portions a recess comprising half of said cross section and arranged to receive the central portion of the respective other quill. The other half of the cross section is thereby connected to the bearing. These measures result in a particularly good guidance of the quills to or in one another and in the carrier sleeve. Finally each quill can advantageously have a thread'at its bearing end which thread cooperates each with one nut which is arranged movably but rotatably on the sleeve. In this manner a simple adjustment of each quill independent from the other one is assured.

The carrier sleeve has advantageously at both of its nected to said latter. The invention will be discussed more in detail hereinafter in connection with a preferred exemplary embodiment.

ends an outer flange, said nut with its front surface In the drawing:

FIG. 1 is a longitudinal cross-sectional view of the carrier sleeve with the two quills and FIG. 2 is a schematic function illustration of the device of the invention in a reduced scale.

Two coaxial, oppositely arranged quills 2 and 3 are according to the invention supported for limited move ment in an axial direction independent from one another in a carrier sleeve 1. A dressing tool 4a and 4b is inserted with, for example, diamonds 5a and 5b into each respective quill 2 and 3. The dressing tools 4a and 4b are inclined in the usual manner at a small angle toward the central axis of the quills 2 and 3. The carrier sleeve 1 is rigidly connected to a support 6, for'example by means of a spring 1a. The support 6 is pivotably about an axis 7 which is arranged perpendicularly to the grinding wheel axis (not illustrated), as indicated by the double arrow 8. Moreover, the support 6 can be moved back and forth in its longitudinal direction, as indicated by the double arrow 9. The function of the dressing device can easily be understood from FIG. 2. If same is in the position illustrated in full lines, then the quill 4a works the side A of the grinding wheel while same is rotating, whereby the support 6 moves in arrow direction 9 parallel to the side A. After dressing of the side B, the device pivots about the axis 7 and thus assumes the position illustrated in dash-dotted lines. Thereafter the side B of the grinding 'wheel 10 is dressed in an analogous manner by the quill 4b. The reference numerals of the diamonds 5a and 5b are now shown in FIG. 2 for reasons of a better understanding.

As stated above the two quills 2 and 3 are supported movably limited in axial direction, that is in direction of the longitudinal axis 11, independent from one another. In the illustrated, preferred exemplary embodiment, they are, as illustrated in FIG. 1, supported movably in one another, whereby the respective ends 4a and 4b opposite the dressing tools 5a and 5b grips around the other quill like a bearing 12 or 13. Both quills have the same diameter and each has in its central portion 14a and 14b a recess 15a or 1512 for the central portion of the respective other quill, which recess occupies half of the cross section. The other half of the central portion or of the cross section is connected to the bearing 12 or 13.

Each quill 2 or 3 has a thread 1.6a or 16b at its bearing end, which thread cooperates with each cap nut 17a or 17b which is arranged against axial movement, but rotatably, on the carrier sleeve 1. In the illustrated exemplary embodiment, the carrier sleeve has an outer flange 18 or 19 at each one of its two ends. The respective nut 17a or 17b is supported with its front surface on the front shoulder 20 or 21 of said outer flange. The flange 24 or 25 of a flange bushing 26 or 27 abuts the inner shoulder 22 or 23 of said outer flange. Each flange bushing 26 or 27 grips over one outer flange 18 or 19 of the carrier sleeve 6 and the respective nut 17a or 17b. Each flange bushing is fixedly connected to the associated nut, for example, by setscrews 29.

For reasons of installation, only one of the bearings, in the illustrated exemplary embodiment the bearing 13, can be made in one piece with the associated quill 3. The other bearing 12 must be manufactured separately from the associated quill 2 and must be connected to the latter, for example, through pins 30.

As one can easily see, each rotation of one of the nuts 17a or 17b results in a shifting of the associated quill 2 or 3 in the sleeve. Therefore, rotation of nut 17b results in a shifting of quill 3. It is understood that the quills are thus movable axially in the carrier sleeve 1, however, they can not be permitted to rotate in it. Therefore a slide piece 31 is provided on the quill 3 which engages a longitudinal groove 32 on the inside of the carrier sleeve 1. The quill 2 is guided nonrotatably in the quill 3 or rather in the recess 15b. However, in addition, a slide piece 33 can also be provided for the quill 2, which slide piece engages on one side the bearing 12 and on the other side the longitudinal groove 32.

The shifting of the quills takes place independently from one another, however, said independent shiftabilityis limited. Each quill can be pulled back into the carrier sleeve only until its rear end abuts at 34 the associated nut. Further, each quill can be screwed out from the carrier sleeve 6 only until the offsets 35 of the same abut one another.

The embodiments in the invention in which an exclusive property or privilege is claimed are defined as follows:

l. Dressing device for the dressing of a profile grinding wheel, comprising:

elongated and hollow carrier sleeve means;

a pair of quill means mounted in said carrier sleeve means in telescoping relationship within each other for movement axially of said carrier sleeve means and with respect to each other, each of said quill means being adapted to hold dressing tool means, each of said dressing tool means projecting outwardly of opposite ends of said carrier sleeve means and adapted to engage said grinding wheel; and

a pair of adjusting means mounted adjacent opposite ends of said carrier sleeve means and adapted to cooperate with said quill means to effect an axial adjustment of the location of said quill means rela tive to said carrier sleeve means.

2. Dressing device according to claim 1, wherein said pair of adjusting means on opposite ends of said carrier sleeve means includes means adapted to adjust the axial location of said quill means at the opposite end therefrom to thereby adjust the axial location of the respective one of said dressing tool means.

3. Dressing device according to claim 1, wherein said quill means are coaxial and wherein said telescoping connection between said pair of quill means includes means defining a bearing surface on each of said quill means to guide the movement of the other of said quill means axially of said carrier sleeve means.

4. Dressing device according to claim 3, wherein both of said quill means have the same diameter at the end holding said dressing tool means and have in their central portion a recess which occupies half of the cross section thereof and is provided for the central portion of the respective other of said quill means, and that the other, full half of the cross section is engaged with said bearing means.

5. Dressing device according to claim 3, wherein said adjusting means each comprises a thread at the bearing end of each of said quill means, and a nut cooperating with said thread, said nut being nonmovably but rotatably arranged on said carrier sleeve means.

6. Dressing device according to claim 5, wherein said carrier sleeve means has an outer flange on each of its two ends, said nut with its front surface being supported on the front shoulder of said outer flange and the flange of a flange bushing abutting the inner shoulder of said outer flange, which flange bushing grips over outer flange and nut and is fixedly connected to said latter. 

1. Dressing device for the dressing of a profile grinding wheel, comprising: elongated and hollow carrier sleeve means; a pair of quill means mounted in said carrier sleeve means in telescoping relationship within each other for movement axially of said carrier sleeve means and with respect to each other, each of said quill means being adapted to hold dressing tool means, each of said dressing tool means projecting outwardly of opposite ends of said carrier sleeve means and adapted to engage said grinding wheel; and a pair of adjusting means mounted adjacent opposite ends of said carrier sleeve means and adapted to cooperate with said quill means to effect an axial adjustment of the location of said quill means relative to said carrier sleeve means.
 2. Dressing device according to claim 1, wherein said pair of adjusting means on opposite ends of said carrier sleeve means includes means adapted to adjust the axial location of said quill means at the opposite end therefrom to thereby adjust the axial location of the respective one of said dressing tool means.
 3. Dressing device according to claim 1, wherein said quill means are coaxial and wherein said telescoping connection between said pair of quill means includes means defining a bearing surface on each of said quill means to guide the movement of the other of said quill means axially of said carrier sleeve means.
 4. Dressing device according to claim 3, wherein both of said quill means have the same diameter at the end holding said dressing tool means and have in their central portion a recess which occupies half of the cross section thereof and is provided for the central portion of the respective other of said quill means, and that the other, full half of the cross section is engaged with said bearing means.
 5. Dressing device according to claim 3, wherein said adjusting means each comprises a thread at the bearing end of each of said quill means, and a nut cooperating with said thread, said nut being nonmovably but rotatably arranged on said carrier sleeve means.
 6. Dressing device according to claim 5, wherein said carrier sleeve means has an outer flange on each of its two ends, said nut with its front surface being supported on the front shoulder of said outer flange and the flange of a flange bushing abutting the inner shoulder of said outer flange, which flange bushing grips over outer flange and nut and is fixedly connected to said latter. 